Best Wearable Technology Companies in Japan
The 54 best Wearable Technology companies in Japan in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: BONX.
- Wearable technology market set to double by 2030 as AI and health trac
- Top 5 Wearable Tech Trends in 2020
Our analysis of 50 Wearable Technology companies
$7.0b in tracked funding; 93% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Wearable Technology companies in Japan
| # | Company | Disclosed funding | Last round | Founder | Employees | Tech stack | App-install YoY | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Ambie Manufacturer of open-ear, "ambient listening" headphones | — | — | Masaaki Matsumoto CEO | — | Cart FunctionalityShopifyWorldShopping+20 | — | 4 patents Acoustic transducer technology for audio playback devices | — |
| 2 | BabyLook Device to monitor baby's health | — | — | Charles Park Co-Founder | — | — | — | — | — |
| 3 | Bellabeat Internet first brand offering smart jewelry | — | — | Urska Srsen Co-Founder & CCO | — | — | — | — | — |
| 4 | Blincam Wearable camera that attaches to user's glasses | — | — | Shota Takase Founder & CEO | — | — | — | 4 patents Integrated camera modules with on‑chip signal processing for mobile imaging devices | — |
| 5 | Calm Wearable device for tracking body vitals duriing fitness training | — | — | Yoshito Date Founder & CEO | — | — | — | — | — |
| 6 | CrossHelmet Provider of smart helmets | — | — | Arata Oono Founder | — | Cart FunctionalityWooCommerceWordPress+27 | — | — | — |
| 7 | Cuxino Smart cushion to monitor sitting posture | — | — | Akito Gyoten CEO & Director | — | — | — | — | — |
| 8 | DFree Provider of wearable devices for urinary incontinence | — | — | Atsushi Nakanishi CEO | — | WordPressMySQLPHP+22 | — | 2 patents Non‑invasive urinary volume monitoring using ultrasonic sensor technology | — |
Top 12 Wearable Technology companies in Japan
#1
Series A · Yokohama, Kanagawa · founded 2021 · 5 employees$6.4Mraised▾
Manufacturer of smart rings designed to monitor and analyze sleep. The rings utilize sensors to gather data related to heart rate, blood oxygen levels, and body temperature. Acquired data is analyzed to provide insights into sleep patterns and potential health concerns. The company also develops mobile applications for data presentation and analysis.
- Sep 2025Conventional Debt—
- Jun 2024Series A$5.6M
- Nov 2021Seed$877.6K
#2
Series E · Tokyo, Tokyo · founded 2014 · 15 employees$15.2Mraised▾
Provider of communication earplugs. It offers a wearable walkie-talkie designed to help users to communicate during outdoor activities like snowboarding, cycling, speedway, running, climbing, kayaking, and more. It has also built-in dual microphones, a built-in windshield filter, and more. The application is available on both iOS and Android platforms.
- May 2023Series E—
- Sep 2021Series D—
- Jan 2020Series C—
- May 2017Seed$1.8M
#3
Series A · Shinjuku City, Tokyo · founded 2018 · 8 employees$3.5Mraised▾
Wearable device for tracking muscle metabolism. The company has developed a wearable device to measure lactic acid concentration within sweat. It also offers MRI technique non-invasively measures for muscle tissue data, such as the separation of fast and slow muscles.
- Jul 2023Series A$3.5M
#4
Series B · Kyoto, Kyoto · founded 2017 · 13 employees$666Kraised▾
Device for sleep disorder management. The company has developed the "Vitawatcher," a medical device for users with sleep syndrome. The device helps to track the signs and symptoms of sleep apnea.
- Feb 2024Series B$666K
- Jan 2022Seed—
#5
Seed · Takamatsu, Kagawa · founded 2019$742.9Kraised▾
Melody provides a device and a cloud-based app for fetal monitoring. The product fetal monitor is a smart, mobile fetal monitoring device, able to assist doctor’s. The system comprises of a fetal heart monitor, a uterine contraction monitor, and a tablet. It has a built-in speaker in the transducer, so it can also be used as a fetal doppler. It also allows for detecting fetal heart location.
- Nov 2023Seed$742.9K
#6
Series A · Tokyo, Tokyo · founded 2016 · 49 employees$4.1Mraised▾
Provider of wearable brainwave measurement technology and AI-powered brainwave analysis. It offers devices and cloud-based services for brain activity visualization and quantification. The company provides tools for electroencephalography (EEG) data collection, signal processing, and pattern recognition. It supports research and development in areas such as sleep analysis, cognitive assessment, and brain-computer interfaces.
- Aug 2021Series A$2.7M
- Jul 2020Seed$1.4M
- 2017Seed—
#7
Seed · Tokyo, Tokyo · founded 2015 · 15 employees$3.5Mraised▾
Xenoma, a spin-off from Tokyo University has developed a wearable e-skin which has embedded sensors to enable a user to monitor motion, breathing, body temperature and other vitals. Eskin allows the user to customize number, type and location of the sensor. Applications include gaming, fitness, and healthcare.
- Jun 2020Seed—
- Sep 2017Seed$1.8M
- May 2016Seed$1.7M
- Apr 2016Grant (prize money)$661K
#8
Series A · Tokyo, Tokyo · founded 2013 · 11 employees$5Mraised▾
Telepathy Inc has developed an eyeglass-shaped wearable device called Jumper which allows the user to share what they see and hear in real time with others. The device is developed by using an optical display, camera, microphone, and sensors. The device can be attached to the prescription glasses or can be carried around the neck. The device comes with two pre-installed applications called Eye Connect which allow user to share each other's view with only one click and Talent Buzz which is a platform to share data. The device has an inbuilt memory of 8GB and is powered by a 1,000 mAh battery.
- Aug 2013Series A$5M
#9
Seed · Suita, Osaka · founded 2005$2.5Mraised▾
Online telemedicine platform for rehabilitation. The Remohub system is a cloud-based platform that enables healthcare professionals to remotely monitor patients using wearable electrocardiographs, ICT, and IoT technology.
- Jan 2020Seed$2.5M
#10
Seed · Tokyo, Tokyo · founded 2012 · 5 employees$1.8Mraised▾
Developer of smart bands to track hand gestures. It offers products for hand gestures through electrical impulses. Product Unlimited Hand is a device that helps users control as well as touch and feel in the virtual world. The sensor reads the movement of hand muscles and the EMS from the device controls the user's fingers and hand enabling them to feel. It also offers an electrostimulation kit developed for researchers, which can control the user’s finger movements by applying electrical muscle stimulation. In addition, it offers an HMD and an armband equipped with a muscle displacement sensor, which helps users operate in VR space by tracking hand movement.
- Feb 2017Seed$1.8M
#11
Seed · Chiyoda City, Tokyo · founded 2015 · 3 employees$923Kraised▾
Inupathy has developed a wearable device that tells about the mental status of the dog by measuring heart rate variability. The colour and the light pattern on the device will show whether the dog is happy, excited, or relaxed. The device also collects the daily health data of the dog. All the data recorded by the device is stored on the cloud server. The app can be used to check the excitement and fun score of the dog. As of Dec 2016 the company is trying to raise money for the device on Indiegogo.
- Jul 2019Seed$923K
#12
Public · Tokyo, Tokyo · founded 2015 · 34 employees$880Kraised▾
Susmed, short for “Sustainable Medicine” takes user data, puts it through an algorithm, and then provides advice for fixing patients insomnia. Their app The yawn is available for iPhone users. It is currently in clinical trials in cooperation with Harumi Hospital affiliated with the National Institute for Neurological Research and Yumikai Kikami Hospital, a social medical corporation from September 2016.
- Feb 2017Seed$880K
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Wearable Technology coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on Wearable Health Tech is moving in Japan
A read on the academic research around Wearable Health Tech — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 361 Japan-affiliated papers.
- The University of Tokyo27
- Kobe University20
- Jikei University School of Medicine20
- Tokushima University19
- University of Occupational and Environmental Health Japan18
- Continuous glucose monitoring8→13
- Diabetes mellitus3→8
- Diabetes mellitus23→47
- Continuous glucose monitoring29→45
- Glycemic27→39
- Type 1 diabetes1→12
- Type 2 Diabetes Mellitus1→10
- Diabetes mellitus10→26
- Continuous glucose monitoring8→23
- Glycemic10→16
- Hypoglycemia3→8
- Type 1 diabetes4→8
Where wearable health is researched across Japan
Location clusters by institution affiliation — each city's volume, stance tone, and a quick read on its hot topic, what's advancing, the opening opportunity, and the main concern.
Who's filing wearable health patents in Japan
Japan wearable health patent filing is cooling — 137 filings from 17 assignees (2016–2025), led by SONY America, SONY, Nippon Telegraph & Telephone; annual filings 17→11.
- SONY America62
- SONY58
- Nippon Telegraph & Telephone26
- Otsuka Pharma16
- Hitachi14
- NTT6
- Kikkoman5
- PHC Holdings4
Common questions
Rohit lives in the feed. He covers what's moving right now — the funding rounds, launches and shifts breaking across the trade press — and ties them back to where the sector is heading.